Woodworking-machine.



No. 666,3!4. Patented Jan. 22', l90l. N. J'. HUTCHINSON.

WOODWORKING MACHINE.

(Application filed Apr. 15, 1899.) (N0 Model.)

2 Sheets-Sheet I.

Patented Ian. 22, I901.

No. 666,3l4.

N. HUTCI'IINSDN. WOUDWDRKING MACHINE.

(Application filed Apr. 15, 1899.\

2 Sheets-Sheet (No Model.)

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UNITE STATES FFICE.

NATHANIEL J. HUTCHINSON, OF TORONTO, CANADA.

WOODWORKING-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 666,314, dated January 22, 1901.

Application filed April 15, 1899. Se a 110- 7 1 0- \NO em T0 ctZZ whom, it may concern.-

Be it known that I, NATHANIEL J OHN HUTOHINSON, machinist, a subject of Her Majesty the Queen of Great Britain, residing at Toronto, in the Province of Ontario, Dominion of Canada, have invented new and useful Improvements in Woodworking-Machines, of which the following is a specification.

My invention relates to machines for making tenons in wood for lock corner-boxes and other purposes. It has for its object to provide improved features of construction and combination of parts; and the invention consists in the construction and the combination and in the arrangement of parts hereinafter particularly described and then sought to be specifically defined by the claims, reference being had to the accompanying drawings, forming a part hereof, and in which- Figure 1 is a front elevation of the machine, and Fig. 2 a vertical section on the line m a: of Fig. 1.

In the drawings the letter A designates the frame, which carries two cross-heads B, adjustable thereon to and from each other by a right and left hand screw 6, operated, for illustration, by a handle u. The cross-heads B carry each cutters C, secured to mandrels c and operated by pulleys c and counter-shaft. Vertical guides D, placed opposite to each other, one on each cross-head B, and adapted to be adjusted toward and from each other by handles 61, connected to screws d, engaging with extensions D of the guides, so as to conform to the Width of the boards tobe cut, horizontal guides E, secured one to each vertical guide D at its lower edge, and adj us'table stops F, secured one to each guide E, constitute or form a hopper designed to receive pieces of wood laid flat one above the other. At the inner end of the guides D are placed vertical slides G, which are adjustable vertically by means of hand-wheels g, so as to leave a space beneath the lower ends of the slides equal to the thickness of the pieces of wood in the hopper, so as to permit one piece of wood at a time to be passed beneath the slides.

Each cross-head B is provided with a stand or overhanging arm H, which carries a sliding pressure-bar 1, adjustable vertically by means of hand-wheels i and screws t", passing through a portion of the pressure-bar and bearing against a portion of the overhanging arm, the adjustment being varied according to the thickness of the boards to be out and the pressure being imparted by means of springs J, of which two may be provided for each pressure-bar and which may be connected at one end to a cross-rod J attached to the upper end of the pressure-bar, and at the other end to hooks J attached to a part of the overhangingarm. Each pressure-b;-1rcarries or engages at its lower end a cross piece or head K, to which is secured a flat springk, placed edgewise thereon and designed to bear on top of the board to be cut when passed beneath the cross piece or head K, which will clear the top of the board, while the spring will bear on the top.

A ram L for moving one block of wood at a time from the hopper works in a guide M, extending beneath the open bottom of the hopper and across the space between the saws, as seen in Fig. 2 of the drawings, and is provided with transverse strips or bars Z and m at such distance apart that the space between them will receive the bottom board of the tier of boards in the hopper, the strip or bar Z serving to push said board forward from the hopper and into the space between the saws, and the strip or bar m serving to push the same board from between the saws and out of the machine on the neXt forward movement of the ram, whereby the blocks or pieces of wood to be out are automatically fed to the saws in one movement of the ram and automatically fed out of the machine in the next movement of the ram.

While the block or piece of wood is in the space between the saws to be acted on by the saws, it is supported below the saws by the lifting ledges or platforms N, one under each of the cross-heads K of the pressure-bars I, and which will support the block or piece of wood near each end, said ledges or platforms having a Vertical movement, so as to lift the wood from the ram and up to the point where the saws will cut the locking-tongues in its ends, the wood being bound or clamped between the lifting ledges or platforms and the cross-heads to the pressure-bars, the pressure-bars and their lower cross-heads yielding under the upward movement of the platforms and against the tension of the springs .I, which cause the pressure-bars to exert a yielding pressure against the piece of wood being cut, and thus the wood is out while clamped under a yielding or elastic pressure. The flat spring it receives the first pressure from the forward movement of the lifting ledges or platforms and conforms to any irregularities in the surface of the wood. While the platforms are raised, the ram is moved back to its position under the hopper, and as the platforms recede downward the springs J press the pressure-bars and the wood which has now been cut down to their normal position, and the piece of wood is brought into the line of travel of the cross-strip 'm of the ram, so that such strip in the next forward movement of the ram will pushthe wood from the machine.

For the purpose of forming a rest for the tenons formed at the ends of the board or wood by the cutters, and thus prevent them from being chipped or broken ofi, slotted blocks N preferably of wood, are attached to the back of the ledges or platforms N, so as to be moved up and down with the platforms. These rests lie under the portions of the piece of wood which extend beyond the platforms and form a support for the tenons cut in the same and prevent the chipping or breaking of the tenons, as before explained, said blocks or rests being each formed with the grooves or slots n for the cutters as the board or piece of wood is moved upward in being fed to the cutters for the formation of the tenons.

The ledges or platforms N are supported by shaft H, which has a vertical movement in slotted ways N at each end of the machineframe and which at its ends and also at its middle is connected by links OSWIDII rocking arms 0 on the shaft 0. At one end of the shaft 0 there is an arm 0 connected to it and provided with a roller p, against which bears a cam P on the shaft 0, said cam in its rotation depressing the arm 0 so as to throw upward the link-connection ends of the rocking arms 0' and raise the shaft 11, so as to elevate the ledges or platforms N.

The letter N designates parts depending from the cross-heads B, and they serve as vertical guides for the platforms N.

The shaft 0 is provided between its ends with a crank-plate Q, having a crank-pin q, connected with a sliding box R, moving in a slot formed in the pivoted arm S, which at its lower end is pivoted to a shaft 1", supported by hangers or brackets 1", and a rod .9 connects the upper end of the pivoted or swinging arm S with the ram L, so as to operate the ram. Shaft 0 also carries a gearwheel S, with which meshes a gear-wheel T on the driving-shaft T, which carries a pulley II.

In operation the pieces of wood or boards are placed flat one above the other in the hopper and resting upon the guides E. In about one-third of a revolution of the crank-shaft the cross piece strip l carries the bottom board or piece of wood from the hopper and onto the ledges or tables N. During the remainder of the revolution of the shaft the board or piece of wood is forced up and down through the cutters and the ram is drawn back, so that in the next revolution the crossstrip m will carry or push the first board from the ledges or platforms and to the back of the machine, while the cross-strip Z will carry the next bottom board from the hopper and move it onto the ledges or platforms, and the operation, as before, will be repeated.

I have described and illustrated the preferred details of construction and arrangement of the several parts and in connection therewith have indicated the mode of operation, and the advantages of the same will be appreciated by those skilled in the art. It is obvious, however, that changes can be made and the essentialfeatures of my invention be retained.

Having described my invention and set forth its merits, what I claim is- 1. In a machine for cutting tenonsin wood, the combination of two oppositely-arranged sets of tenon-forming cutters, a reciprocating ram traveling below the space between the two sets of cutters for moving a board in its own plane to a position in front of the two sets of cutters, and means for moving the board at right angles to its plane from the ram and moving it past the cutters to cut tenons in the opposite ends of the board, substantially as described.

2. In a machine for cutting tenons in wood, the combination of two oppositely-arranged sets of tenon-forming cutters, areciprocating ram traveling below the space between the two sets of cutters for moving a board in its own plane to a position in front of the cutters, said ram having a shoulder for moving the board in position in front of the cutters and another shoulder to remove the out board from in front of the cutters, and means for moving the board at right angles to its plane from the ram and moving it past the cutters and away therefrom, substantially as described.

3. 'In a machine for cutting tenons in wood, the combination of two oppositely-arranged sets of tenon-forming cutters, a reciprocating ram traveling below the space between the two sets of cutters for moving a board in its own plane to a position in front of the sets of cutters, a vertically-movable table or platform for moving the board at right angles to its plane between the opposite cutters and presenting its opposite ends to the cutters, and means timed in movement to move the platform carrying the board and restore it to position to move another board from the ram on its delivery return, substantially as described.

4. In a machine for cutting tenons in wood,

the combination of two oppositely-arranged sets of tenon-forming cutters, a reciprocating ram traveling below the space between the two sets of cutters for moving a board in its own plane to a position in front of the two sets of cutters, a vertically-movable table or platform for moving the board at right angles to its plane between the opposite cutters and presenting its opposite ends to the cutters, a pressure-bar above the table, one for each set of cutters, said table and pressurebars clamping the board between them on the upward movement of the table, and means timed in movement to move the platform carrying the board and restore it to position to move anotherboard from the ram on its delivery return, substantially as described.

5. In a machine forcutting tenonsin wood, the combination of two oppositely-arranged sets of tenon-forming cutters, a reciprocating ram traveling below the space between the two sets of cutters for moving a board in its own plane to a position in front of the two sets of cutters, a vertically-moving table or platform for moving the board at right angles to its plane between the opposite cutters and presenting its opposite ends to the cutters, and slotted rests or blocks secured to the outer edges of the vertically-movable table or platform next to the cutters to constitute a support for the portion of the board projecting beyond the edges of the table and prevent the tenons being chipped or broken, substantially as described.

6. In a machine for cutting tenons in wood, the combination of two oppositely-arranged sets of tenon-forming cutters, a reciprocating ram traveling below the space between the two sets of cutters for moving a board in its own plane to a position in front of the two sets of cutters, a vertically-moving table or platform for moving the board at right angles to its plane from the ram and moving it between the opposite cutters and presenting its opposite ends to the cutters, and a sliding spring-influenced pressure-bar above the table, one for each set of cutters, substantially as described.

7. In a machine for cutting tenons in wood, the combination with two oppositely-arranged sets of cutters and a horizontally-reciprocat ing ram working below said cutters, of the op positely-arranged vertically-movable ledges or platforms, one on each side of the recipro eating ram, and means for lifting said ledges or platforms so as to raise the board to be cut from the ram and carry the same to the cutters and then lower said board, substantially as described.

8. In a machine for cutting tenons in wood, the combination with two oppositely-arranged sets of cutters, and a horizontally-reciprocating ram working below said cutters, of the oppositely-arranged vertically-movable ledges or platforms, one on each side of the reciprocating ram, and the spring-influenced sliding pressure-bars, one above each ledge or platform, a cross-head carried at the lower end of each of said pressure-bars and a spring to each of said cross heads arranged to bear against a board restingupon said ledges, substantially as described.

9. A machine for cutting tenons in wood, comprising two cross-heads adjustable to and from each other, a set of oppositely-arranged cutters carried by said cross-heads, a hopper arranged at the end of said cutters and having sides adjustable to and from each other to conform to the distance apart of said outters, a reciprocating ram for moving boards below said cutters for cutting tenons therein, vertically-moving ledges or platforms, one under each set of cutters, for moving the boards upward to the cutters, slotted rests or blocks secured to each ledge or platform on the side next to the cutters to support the portions of the board projecting beyond the ledges and prevent chipping or breaking of the tenons, sliding spring-influenced pressure-bars, one above each ledge or platform, and mechanism for timing the operation of said several parts, substantially as described.

N. J. HUTCHINSON.

Witnesses:

A. F. LoBB, LILY E. HALL. 

